Process and apparatus for barking logs



*Nov. 18, 1930. o. A. BARTHOLOBYAEW 1,781,942

PROCESS AND APPARATUS FOR BARKING LOGS Filed March 14. 1929 s Shets-Sheet 1 gwuemto o Nov. 18, 1930. o. A. BARTHOLOMEW 1,

I PROCESS AND APPARATUS FOR BARKING LOGS Filed March '14: 1929 s Sheets-Sheet 2 gwve'ntoz A 1930- o. A. BARTHOLOMEW 1,781,942

PROCESS AND APPARATUS FOR BARKING LOGS Filed March 14.. @929 s Sheets-Sheet 5 gwuento'o Patented Nov. 18 1 930. f

. onto A. nanrnoriorinw, or Kansas CITY,*1II SSOURE f I I rnocnss Dari-names nonf annxrne noes ."Apfilication filedllvliarcn14:,1923. srial nofis iee iaf This invention relates to a machinejfor re- ,movingthe bark from logs and is more par- 'ticularly designed, although" not limitedto this use, for removing the bark from relatively long logs for use as""telep'ho'ne, tele- "graph, and'jelectricgpoles, piles etc.

The principal objectofthis invention is to providea simple, easily operated, device Hwhich will handle a relatively largejquaittity of logs simultaneously and willremove; the bark therefrom l without] damage to I the logitself, i Y 7 Another object is to so"; construct the'machine that the logs can-be quickly and easily placed therein and 'removedthere from without the use of auxiliary hoists or loading dev ces. 1

A further object of theiinventi'on is to utilize the well knownfact that; logs abrading against themselves will effectively removethe bark from each other, especially when imniersed or water soakedi Other objects and advantagesreside the detail construction of the invention, which is designed for; simplicity, economy, v and I efiiciency. 'These will become more apparent from the following description. r

In the f llowing detailed description'of the invention reference is had'to the accompanytion;

ing drawing which forms a ipart hereof. Like-numerals refertolike parts in all'views of the drawing andthroughout the descrip- 1.. the-M i 1 j' Fig. 1 illustrates a cross section'through the invention inthe 'charging' positionrfi I Fig. 2 is a similar cross section illustrating the device in operation. V F igg 3 isa similar cross section illustrating the device-in the discharging position.

{Fig 4 is a fragmentary plan view of the device when in the position of Fig. 2.

Fig. 5 illustrates a cross section through an alternate form of the invention. The invention comprisesa barking tank 10, preferably formed with a semi-cylindrical bottom. To one side of the barking tank 10 is a receiving pond or tank 11, which is'separated from the tank 10' by-means of a low partition 12. Extending axially throughout substantially tothelevel of the shaft 13.

--the tank l Ofis a horizontal" shaft 13 carried in suitable bearing boxes27, Cross members I 14 are secured-to. shaft castings 15 which are keyed or otherwise secured to the shaft13, i V

at spaced intervals. 1"Thecrossmembers 14 may be connected by, means of planks orother memberslG extending longitudinally of the" tank 1O. lItrthe i device is used, 'however,jfor uniformjlengths of logs the planks l6 maybe omitted, as. the 31,60 c'rossmembers .14 will effectively act against Supported above'ea ch of'the members 14 an' arcuateftruss'member17 which is secured to the extremities of'the member l l and sup- 565 portedby means of radial spo'kes '18 from the shaft casting-15. At one extremityof each 7 of the members-14 theitr'u'ss' member 17 projectsbeyond the face thereofas shown at 19.

'- The'logs are fed to ItheCbarking tank '10 2'7? from any suitable receivingdeck120, upon whichthey are held by latches 21 operated "from any suitable operating mechanism through themedium ofa connecting rod 22.

The tanks 10 :and 11'- are filledwith water 7' While the device is being charged or filled with logsthe operating members occupy the position illustrated inFig. 1 and the latches i V 21are released to allow'thelogs to roll from v33o the deck 20 intothe tank 10. When a sufiii t cient'number of logs have been placed in the tank 10, the 'latchesQl are raised to'support the logs'up'on the-deck QO-and the sha'ftl3 is' rotated to the solid line position'of Fig. 2.:if

This allows all ofthe contained logsto float or roll to the highest point, as illustrated, The shatt'iis 'thenrreversed to the position indicated in broken line in Fig. 2, allowing the logs to roll or float back to'the Other side of L the tank 10. The shaft 13 is now reciprocated between the two positions indicated in Fig.2, until the action of the logs rolling and pounding against each other, against the sides of the tank 11, and against the planks 16, has. .95 removed the 'bark therefrom. Y Y

It willbeinoted that-during the bark removing process the projecting 'eXtr emities'l 9 on thGtlLlSS member 7 prevent the'logs'trom' floating intoithe receiving tankll;

\Vhen the bark has been sufliciently removed the shaft 13 is rotated to the position of Fig. 3 and, as the members 14 and the .planks 16 rise on the discharging side, the logs will float and roll into the receiving tank 11. The shaft is now rotated in the direction of the arrow of Fig. 3, to the position of Fig. 1, when a new charge of logs is received.

It will be noted the arcuate truss members 17 act to hold the logs in the receiving tank while the barkingdevice is passing to the an elevator chain or they can be simply float ed from the tank to the desired point. In fact the receiving tank-11 could be the storage a pond of the plant if such an arrangementwas tank is within the-skill of anyfme'chan-ic.

convenient.

The shaft 13 can manner, such as by an electricmotor through the medium of suitable gears, the motor being preferably of the direct current, quick starting and. easily ,reversingtype. The shaft could also be rotated through the medium of gears and cl'utchesfroma gas or gasoline engine. In fact the method of rotating She ne method, however, forrotating the shaft is illustrated in Fig. 4, in which two steam cylinders 23 supporting cross head guides 24, actuate connecting rods 25. V V The connectingrrods .25. are secured to crank disks 26securedonthe extremities of tion of his throttle valve, reciprocate orrotate the shaft 1'3-as desired. Steam is probably the better method for actuating the deinders 23 can then be employed forheatingthe water in the tank 10 so as to quicken the bark softening action thereof. The barkremoved from the logsand other 'refuse' about the I plant will provide suflicient fuel to provide the steam. I I

. .The removed charging wave or surge 'andcan then be removed fromthe water through screens or in a any other desired manner.

In Fig. 5 I have illustrated an alternate form ofthe invention employingthe same principle as .the preceding form- In this form the logs are discharged from the deck 20 I be rotated in any-desired the usual log vices. vice in that the exhaust steam from the cyl- I bark will be forced into the receiving tank 11 by; the action 'of the -distheir lower faces, such as indicated at 33, to facilitate the bark removal. The cross members 32 in this form. are not connected together by longitudial'members or planks but are spaced apart so that the arms of the discharge spiders 34 can pass therebetween.

The spiders 34: are carried in spaced apart relation upon a discharge shaft 35 which extends throughout the length of the tank.

At the feed side of the tank 28, arcuate side members 36 are hinged at 37 and operated by means of a connecting rod 38 from any suitablemech'anism.

The alternate. form operates, as follows: The side members 36 are drawn outwardly to the broken line position and the latches'21 are released. This allows the logs to fall betweenthe side members 36 and the extremities of the cross members 32. 7 After asuflicient number oflog's are in placetheside" members 36 are forced forwardly soasto force the logs beneath the members 32.f 'The shaft 29 is now reciprocated'backwardly and forwardly until the bark is worn away. by the abrasion of thelogs.

To dischargethelogs, the shaft is stopped in the broken .line position of Fig. 2 and the discharge shaft 35 is rotated so that the I arms of the spiders 34 will pass upwardly and force-the logs from the barking por- .tion ofthe deviceinto a receiving portion,

indicated at 39. Thus the arms of the spiders 34E serve for the left side of the barking tank' and the sidemembers 36' serve as the the shaft 13. These cylinders are under the v control of an operator who can, by manipularight side ofthe barking tank. 7,

'The'logs' can be removed from the portion 39 either by-floating them away or by any of elevating and conveying de- -Whilezthe invention has been. describedias' particularly'applicable for longpoles, it is desired to be understood that it is not limited to this use, but will be found valuable for removing the bark from logsof any length.

At the present time-bark is usually removed from short bolts forpulp purposes-byrolling them in a drum, the. ends ofthe bolts become mashed or broomed and the dlltwtlld ro ks with which they are rolled are pounded into the broomed ends. This dirt iscarried .to the grinding machines," causing rapid wear, damage, and impure pulp. With the use of the present invention, however,- the dirt and rocks. settle immediately to the .bottom of the tank and are not pounded intothe wood.- Rossing machines, while very satisfactory for removing bark, are-expensive to operate, require constant resharpemng of the knives and remove a large percentage of the valuable pulp woodin addition to the bark. These disadvantages will be obviated by the use of the present inventionupon pulp wood. e

.While a specific form of the; improvement has been described and illustrated, herein,

it is desired to. be understood that the same may be varied within the scope of the ap pended claims, without departing from the spirit of the invention.

' Having thus described the invention, what I claim and desire to secure by Letters Patent is V v 1. A device for removing the bark from logs comprising: a tank adapted to contain water; a shaft extending longitudinally of said tank; cross. members carried by said shaft; and means for oscillating said shaft so that said cross members will force said logs alternately below the surface in said tank atopposite sides thereof.

2. Log barking apparatus comprising: a tank adapted to contain water andoscillat ing members extending across in said tank;

and means for alternately forcing the opposite extremities of said members below the surface of said water so as toforce logs below the surface and allow them to float back 1 -to said surface at the sides of said tank.

v3. Log barking apparatus-comprising: a tank containing water; a barking member. in

saidtank ad{'acent the surface of said'water and a pivota support for said barking mem her and means for rocking saidmember so that said member will act to alternately force logs beneath the surface atone side of said jacentsaid barking tank and open thereto; 7 and means forrotating said shaft so that said cross'members will force the logsfrom said barking tank into said receiving tank; and;

a downwardlyprojecting member at one-extremity of'said crossmembers arranged} to prevent the passage of logs from said barking I tank to said receiving tank during the barking operation.

. A device 'for removingfthe bark from" oscillating said shaft. so that the extremitiesv of said cross members will alternately force said logs into said water ;'and means for plac- 'ing said logs under said cross members; said means! comprising hinged side members arranged toswmg. away from. and toward the extremities of said cross members. 1 g

In testimony whereof I aflix my signature.

'ORLO BARTHOLOMEW.

tank and allow them to float to the surface'at.

the opposite side thereof.

4; A device for removing the bark'from f logs comprising: a tank adapted to contain water; a shaft extending longitudinally of said tank; cross members carried by said shaft and means for oscillating said shaft so that the extremities of said cross members i g s will alternately enter said water, so as to 1 force the logs therebelow and allo w them to float toward the elevated extremity.

5. A device for removing the bark from logs comprising: a barking tank adaptedto contain water; a'shaft extending longitudinally of said tank adjacent the surface of said water; cross members carried by said shaft;

means for oscillatingsaid shaft so that the extremities of said cross memberswill-alternately enter said water; a receiving tank ad- 1 jacent said barking tank and open thereto;

.means for rotating said shaft so that said cross members will force the logs from said barking tank into said receiving tank; and, an arcuate truss member carried by the upper sides of said cross members and acting to prevent the return of the logs from the receiving tank to the barking tank.

6. A device for removing the bark from logs comprising: a barking'tank adapted to contain water; a shaft extending longitudinally of said tank adjacent the surface of said water; cross members carried by said shaft; means for oscillating said shaft so that the extremities of said cross members will alter nately enter said waters; areceiving tank adi ion 

